Shuttle



Patented Feb. 26, 1929.

UNITED'STATES PATENT OFFICE.

LUIGI PAVIA, or ALLENTOWN, PENNSYLVANIA.

SHUTTLE.

AAppleman,mea February s, 192s.` serial No. 252,806.

There yis a type of shuttle tension devices in which coacting means, one of which is normally urged crosswise of the thread., maintain a bend or bends in the tl'iread to tension it, usually in a zigzag forni. l't has been proposed to adapt suclrcoacting means to operatively receive the threa l in the automatic replenishing of the supply of the thread orifilling of the nshuttle by construct ing the stated one thereof so that when the shuttle having received the fresh filling package, moves across the loom said means will be drawn baci; by'

thereon of the filling ,as the latter tautens:

` for example, see myap'plication, Serial No.r

166,298. I have found, however, thatl the tension .device y.sometimes `fails to become threaded in this manner, but that ifrthe sait.

normally urged one of the two coacting ineansl forming suchV device be repressed by inc-ans. independent of the rfilling the threadingroii Said devicewill in "lia-llibly occur as intended.y To this end I provide in the shuttle a represser forv the normally urged means, and

r this represser is actuated by some agencyv passed by the shuttle in its flight.' Such agency may be, for example, the top of' the warp shed, and Vwhile of course. this" will act on the repressor on every iiight of the shuttle and so on every flight cause the tension device for a period during such flight to be inactive to exert tension, near the end of the flight, or

just before the shuttleenters the box being l then approached, it will release the represser and permit the tension device to establish the i tension in the final part of such flight.

l further provide means forl preventing the twirling of the thread or filling around the package when beingv drawn therefrom from possibly causing failure of the thread to be caught fully in the tension device.

I have shown my invention applied to a.

shuttle such as is shown in my mentioned pending application, but onlyby way of eX- ample, f

Fig. 1 beinga plan of a shuttle embodying the invention;

Fig. 2 is a side elevation, partly broken away; and Y Figs. 3 and 4, sections on lines 3-3 and 4 4, respectively, of Fig. 2.

The shuttle body 1; cavity 2 for filling package .3; filling channel 4 and groove 5 on the top near the forward end of the body 1;

lateral notch 6 forming the filling outlet vin the front side of the shuttle; ycasing of' the the lateral pressure tension device fitted in said body; the means of saiddevice coacting to maintain' bends in n iereby tension the filli y ne comprising arbor l10 suitably journal at its ends in the casing, a laterally extending arm 10 and other threadguiding) upwardly extending hook-shaped arms S10" formed with arched tails 10d having cam-surfaces 10G, and the other a series of individually i tj des 14 fulcrinned on a pin .ing laterally across arms 10b and in alternation therewith and having beaks 14" inclined in owardly and toward the front of the shuttle; elastic means, as a rubber band 11, normally urging the first of said coacting means to the position shown in Fig. 3-

i. e., bearing against the upper end of the slot 7 in-which plays the arms 10a against,

which such band 11 bears; elastic means, as

guides 14, termin g the other of said coacting means, against the upper ends of other slots 'filling A isheld taut and caused to bear down oncani-sur'races 10e and then, after passing the'hooks at 10c, it is shifted toward thef'ront of the shuttle pastthe bealrs 14h, it will come into the tensioning control ofsaid coacting means. The casing end walls usually will be recessed at 1.8 to receive the thread, and the casing has a wall 18l forming with surfaces 10e yof the means 10a V-shaped threadr entrance, andthere will also usually be a plate 20 or equivalent to form a sharpened nose 2On overhanging channel 4 and notch 6, so that as th shuttle moves lto the left in Figs. l. or 2 after receiving. a fresh .filling package 3 the thread (attached to some part of the loom) will come into the tensioning control of said coacting means, asstated, and also in groove 5 and', on` the'return stroke, form 1n a bightl Land extend from the iillingoutlet 6caught ing can overcome when the automatic threading is to occur, so that the filling niayfail to pass the beaks 14", or someof them. Hence I provide the represser, as follows.:

v springs 15, .normally l'iolding the thread-,ff

Said represser is a blade 2l fulcrumed on a pin 22 in a slot 23 in one side of the shuttle body, being movable in a vertical plane to limits afforded by a slot 21a therein receiving a pin 24. At its upward limit it protrudes, its protruding portion being rounded or forming a cam surface; it is normally held at its upward limit by a spring device 25. Its free end depends and is notched, as at 2l", to straddle the arm l0a of said normally urged one of the coacting tensioning means.

When the shuttle moves to the left after receiving (from the shuttle box-not shown-- at the right) a fresh filling package and enters the shed B of warp, with the thread trailing it, represser 21 is depressed by the top of the shed and so represses the normally urged one of the two coacting means, thus relieving the thread of that function and leaving it, tautened, only to slip over the bealrs 14:1. The represser remains depressed until the shed (or it may be some other obstruction provided on the loom) is passed, whereupon, before the shuttle enters the other bon, it rises, releasing said means so that the tension is exerted on the thread at the end of the shuttles Hight. If for any reason the thread should not of itself slip over the bealrs the hooks l()C will positively cause it to do so on the return flight of the shuttle: and in this aspect of my invention it is broadly new to provide, with thread guiding means, (suoli as the beaked elements la), movable means (such as 21 and lever l.0--la-10b afford), having a part (as 2l) thereof exterior of the shuttle and to be engaged by an actuating instrumentality eX- traneous of the shuttle, for moving the thread past the first means.

It has been found that the twirling of the thread around the package 3 it is paid off therefrom sometimes causes a failure thereof to come into full engagement with the tension device. Wherefore, I provide further a thread or iilling trap here consisting of an upstanding plate 2G arranged in cavity 2 and having a horizontally elongated opening 26aL provided with a downward V shaped thread tion and yieldable in the lopposite direction,

the thread being adapted to bear against the side of said means facing the first direction and move it in the second'direction, threadguiding means arranged to be passed by the thread on its moving the first means in the second direction and thereby adapted to coact with the latter to maintain al bend `in the thread, and movable means in the shuttle, actuable at a point extraneous thereof, for moving said iirst means in the second direction.

2. In combination, a shuttle body, a threadguiding means normally urged in one direction and yieldable in the opposite direction, the thread being adapted to bear against the side of said means facing the iirst direction and move it in the second direction, thread guiding means arranged to be passedv by the thrcadon its moving the first means in the second direction and-thereby adapted to V'coact with the latter to maintain a bend in the thread, and movable meansm the shuttle,V

having a part thereof exterior of the shuttle and to be engagedby an actuating instrumentality extraneous of the shuttle, for moving said iirst means inthe second direction.

3. In combination', a shuttle body, a thread guiding means arranged to be passed by the thread and with which thethread is thereupon adaptedv to be held in guided engage` LUIGI PAVIA. 

